United States Patent 3043991
US Patent References:
Printing press
- - 1964874
Stop means for textile apparatus and the like
- - 2438365
Photoelectric scanner for register regulation
- - 2486334
Photoelectric article detector
- - 2916633
Printing press
- - 1964874
Stop means for textile apparatus and the like
- - 2438365
Photoelectric scanner for register regulation
- - 2486334
Photoelectric article detector
- - 2916633
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250/559.430, 28/187, 361/205, 57/81